Clean Fill Determinations Library/IMDcleanfill.pdfClean fill – As defined in DEQ regulations, clean fill means “material consisting of soil, rock, concrete, brick, building block,

Oregon Department of Environmental Quality

Clean Fill Determinations

Materials Management 700 NE Multnomah St. Suite 600 Portland, OR 97232 Phone: 503-229-5696 800-452-4011 Fax: 503-229-5850 Contact: Heather Kuoppamaki [email protected] www.oregon.gov/DEQ

DEQ is a leader in restoring, maintaining and enhancing the quality of Oregon’s air, land and water.

mailto:[email protected]


Oregon Department of Environmental Quality ii

Documents can be provided upon request in an alternate format for individuals with disabilities or in a language other than English for people with limited English skills. To request a document in another format or language, call DEQ in Portland at 503-229-5696, or toll-free in Oregon at 1-800-452-4011, ext. 5696; or email [email protected].


DisclaimerThis directive is intended solely as guidance for DEQ employees. It does not constitute

rulemaking by the Environmental Quality Commission and may not be relied upon to create an

enforceable right or benefit, substantive or procedural, enforceable at law or in equity, by any

person. With written managerial approval, DEQ employees may deviate from this directive.DEQ anticipates revising this directive from time to time as conditions warrant.

Document Development

Heather Kuoppamaki

Reviewed By: Audrey O'Brien

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Table of Contents Intent/Purpose/Statement of Need ......................................................................................... 1

Applicability .......................................................................................................................... 1

Summary ................................................................................................................................ 1

Background and Definitions .................................................................................................. 1

Abbreviations Used in This Directive.................................................................................... 3

Updates to 2014 Directive ..................................................................................................... 3

Directive ................................................................................................................................. 4

7.1. Who can make clean fill determinations ................................................................... 4

7.1.a. Generator 4 7.1.b. DEQ Materials Management 4 7.1.c. DEQ Cleanup 4

7.2. Placement Locations ................................................................................................. 4

7.2.a. Physiographic Provinces 4 7.2.b. In-Water Locations 5 7.2.c. Clean Fill Land Disposal Sites 5

7.3. Clean Fill Evaluation ................................................................................................ 5

7.3.a. Material description 5 7.3.b. Contaminants Evaluation 6 7.3.c. Compare chemical concentrations to clean fill screening levels 7

Derivation of clean fill screening levels ................................................................................ 8

8.1. Table 1 ...................................................................................................................... 8

8.2. Table 2 ...................................................................................................................... 8

8.3. Modifications ............................................................................................................ 9

Review Schedule .................................................................................................................... 9

Record of Revisions to IMD ................................................................................................ 10

Tables: Table 1 - Province specific and background metals Clean Fill Screening Levels Table 2 - Clean fill screening levels for organics and other selected constituents Figures: Figure 1 – Physiographic Provinces of Oregon Figure 2 – Clean Fill Evaluation Flow Chart

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Intent/Purpose/Statement of Need DEQ often receives requests to determine or confirm whether solid waste qualifies as clean fill. Oregon Administrative Rules define clean fill and allow DEQ to exempt clean fill from regulation as solid waste in many instances. It is important to note that clean fill that is mixed with solid waste is considered to be solid waste. This directive describes the screening criteria DEQ Materials Management staff uses to evaluate whether material meets DEQ’s definition of clean fill for purposes of reuse or disposal.

Applicability DEQ Materials Management staff are to use this Internal Management Directive to determine whether a waste material is clean fill or needs to be regulated as a solid waste.

Summary This directive lays out a process and provides screening values that DEQ Materials Management staff should use to prepare and review clean fill determinations.

Section 7 of this directive describes the process that DEQ Materials Management staff will use to make clean fill determinations. Section 8 provides information on how the clean fill screening levels were determined, and information on how and when the screening levels can be updated. Tables 1 and 2 provide clean fill screening levels.

Background and Definitions Clean fill – As defined in DEQ regulations, clean fill means “material consisting of soil, rock, concrete, brick, building block, tile or asphalt paving, which do not contain contaminants that could adversely impact the waters of the state or public health.” Clean fill does not include “putrescible wastes, construction and demolition wastes and industrial solid wastes.” [OAR 340-093-0030(18)]. This definition is clarified in the following subsections of the regulations:

Asphalt paving means “asphalt which has been applied to the land to form a street, road, path, parking lot, highway, or similar paved surface and that is weathered, consolidated, and does not contain visual evidence of fresh oil.” [OAR 340-093-0030(9)].

Clean fill that has been separated from construction and demolition waste is considered clean fill [OAR 340-093-0030(26)].

https://secure.sos.state.or.us/oard/viewSingleRule.action?ruleVrsnRsn=71073




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Clean fill land disposal sites – DEQ’s Materials Management Program does not regulate clean fill land disposal sites that are managed correctly. If solid waste is accepted at such a clean fill land disposal site, the facility is then subject to permit requirements and possible enforcement action by DEQ. This is stated in the following regulations:

A disposal site does not include a site that is used by the owner or person in control of the premises to dispose of soil, rock, concrete or other similar non-decomposable clean fill material, unless the site is used by the public either directly or through a collection service [OAR 340-093-0030(38)].

A person owning or controlling a land disposal site used exclusively for the disposal of clean fill may be exempt from DEQ solid waste permitting requirements. Clean fill still must be managed so that, when placed or disposed, it will not create an adverse impact on groundwater, surface water, or public health or safety. [OAR 340-093-0050(3)(c)].

Permit exemptions - Persons owning or controlling a land disposal site used exclusively for the disposal of clean fill, are specifically exempted from the requirements to obtain a DEQ solid waste permit. Such persons must comply with all other provisions of OAR chapter 340, divisions 93 through 97 and other applicable laws, rules, and regulations regarding solid waste disposal. The exemption does not apply if the materials have been contaminated such that the Department determines that their nature, amount or location may create an adverse impact on groundwater, surface water or public health or safety [based on OAR 340-093-0050(3)(c)]. Additional information on receiving DEQ approval at an exempt site is provided in OAR 340-093-0080:

A person wishing to obtain an exemption from the requirement to obtain a solid waste permit for disposal of an inert waste in specified locations may submit a request to the Department. The applicant must demonstrate that the waste is substantially the same as “clean fill.” The request shall include but not be limited to the following information:

(a) The exact location (including a map) at which the waste is to be disposed of and a description of the surrounding area;

(b) The monthly rate of disposal;

(c) A copy of the Safety Data Sheet (or equivalent, if a Safety Data Sheet is not available) for all applicable raw materials used at the facility generating the waste;

(d) A description of the process generating the waste and how that process fits into the overall operation of the facility;

(e) Documentation that the waste is not hazardous as defined in OAR 340, division 101. The procedure for making a hazardous waste determination is in OAR 340-102-0011;

(f) A demonstration that the waste is inert, stable, non-putrescible, and physically similar to soil, rock, concrete, brick, building block, tile, or asphalt paving;

(g) A demonstration that the waste will not discharge constituents which would adversely impact the waters of the state or public health.



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Abbreviations Used in This Directive DEQ – Oregon Department of Environmental Quality

ECO SSL – EPA Ecological Soil Screening Level

EPA – United States Environmental Protection Agency

IMD – Internal Management Directive

OAR – Oregon Administration Rule

RBC – Oregon DEQ Risk Based Concentration

RSL – EPA Regional Screening Level

USGS – United States Geological Survey

VOC – Volatile Organic Compound

Updates to 2014 Directive This 2018 update makes the following changes to the clean fill IMD-

• The format is modified to meet DEQ’s IMD format guidelines.

• Modifies language to reflect rule requirements.

• Clarifies and expands some of the guidance language.

• Updates the clean fill tables to:

include EPA groundwater protection SSLs (adjusted to reflect Oregon DEQ dilution attenuation factor),

remove the DEQ chemical-specific calculation for leaching to groundwater [since these are now provided by the EPA soil screening levels (SSL)],

incorporate updated DEQ risk based concentrations (RBCs) and EPA regional screening levels (RSLs), and

include screening ecological benchmarks developed by Oak Ridge National Laboratory.

• Updates links to Oregon DEQ’s new web pages.

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• Removes lanthanum, niobium, technetium, tellurium, titanium, and tungsten from Table 1 as they are not commonly detected in soils in Oregon, and are generally not contaminants of interest at sites investigated in Oregon.

Directive 7.1. Who can make clean fill determinations 7.1.a. Generator When generators of excavated materials (or their consultants) ask how they can make their own clean fill determinations, DEQ Materials Management staff should explain that, when presented with a permit-exemption application, DEQ evaluates whether a material is clean fill according to the process outlined in this IMD.

A generator always has the option to do their own statistical analysis and make site-specific clean fill decisions based on the material generated.

7.1.b. DEQ Materials Management DEQ Materials Management staff should encourage the generators of material (or their consultants) to make their own clean fill determination based on this IMD, including the clean fill screening levels provided in Table 1 and Table 2. If generators want to use different risk assumptions or would like DEQ to review clean fill determinations and provide approval, direct them to apply for a permit exemption (OAR 340-093-0080) and pay any associated fees.

7.1.c. DEQ Cleanup If a generator is remediating a site under our Cleanup Program, DEQ Materials Management staff should involve DEQ’s project manager for the site. Under cleanup statutes, DEQ may exempt the onsite reuse of materials from regulation under solid waste statutes, provided that substantive requirements are met. [See ORS 465.315 (3) and (4)]

7.2. Placement Locations 7.2.a. Physiographic Provinces The clean fill values shown in Table 1 take into account naturally occurring concentrations of metals and metalloids in the various physiographic provinces within Oregon (Figure 1). These concentrations are compiled from DEQ Cleanup Program’s background metals technical report1. Clean fill generated in one physiographic province may not qualify as clean fill in another physiographic province with lower background metals concentrations. The material must be below the clean fill screening levels in both the province in which it is generated and the province in which it is disposed.

1 DEQ. 2013. Development of Oregon Background Metals Concentrations in Soil, Technical Report. March. https://www.oregon.gov/deq/FilterDocs/DebORbackgroundMetal.pdf

https://www.oregon.gov/deq/FilterDocs/DebORbackgroundMetal.pdf

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7.2.b. In-Water Locations The clean fill determination process applies only to terrestrial (upland) reuse or disposal. The Clean Water Act and associated state water quality rules, rather than the solid waste rules, govern the filling of wetlands or waters of the state.

If generators of clean fill plan to place the material in wetlands or other waters of the state, DEQ Materials Management staff should direct them to the Army Corps of Engineers and the Oregon Department of State Lands.

7.2.c. Clean Fill Land Disposal Sites If any solid wastes are be disposed of at a site that accepts clean fill, the site is no longer exempt from DEQ solid waste permitting requirements.

7.3. Clean Fill Evaluation The clean fill definition in OAR 340-093-0030 refers to material type as well as the presence of contaminants that could adversely impact waters of the state and human health. Both parts of the definition must be satisfied for the material to be considered clean fill.

(1) The material type is limited to soil, rock, concrete, brick, building block, tile or asphalt paving and does not consist of putrescible wastes, construction and demolition wastes and industrial solid wastes.

(2) The contaminants may not adversely impact waters of the state or public health. The clean fill screening level tables are based on background concentrations (for metals) and risk screening levels published by Oregon DEQ and EPA.

The steps to conduct a clean fill determination are described below. These steps are also shown in Figure 2.

7.3.a. Material description The first step in performing a clean fill determination is to check that the material meets the general material definition. To do this, determine whether the material:

• Consists of soil, rock, concrete, brick, building block, tile or asphalt paving; and, • Does not include putrescible wastes, construction and demolition wastes, or industrial

solid wastes In addition, specific material attributes should be considered. Some examples:

• Asphalt paving must be used, be weathered material (not fresh asphalt) and consist of large, intact chunks. Ground up asphalt is not clean fill.

• Concrete, brick, blocks or tile must be unpainted, unless the materials have been evaluated for hazardous constituents, and concentrations of those constituents are below clean fill screening levels.

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• If filler material used in the production of concrete, brick, building block, or tile has the potential to impact waters of the state or public health, the material is not clean fill.

Material that is determined to not be clean fill is solid waste. It may be disposed under a location-specific permit exemption, a solid waste letter authorization, or in a permitted landfill. The material also potentially may be reused under the authority of a Beneficial Use Determination.

7.3.b. Contaminants Evaluation The second step in conducting a clean fill determination is to evaluate the risk from contaminants in the material. This is based on the presence of staining or odor, known hazardous substances, and laboratory analysis of the material for contaminants of potential concern.

Staining or odor If the material appears chemically stained or has a chemical smell it is not clean fill. Chemicals that stain or produce odors indicate the material contains contaminants that could impact waters of the state or public health.

Hazardous waste If the material contains a listed or characteristic hazardous waste it is not clean fill, even if the chemical concentrations are below clean fill table values. The generator may use alternative management methods such as “contained-in” determinations2 to decide the ultimate disposal of the material.

Characterize the fill for chemical characterization DEQ Materials Management staff should determine whether applicants adequately characterized the chemical quality of fill materials.

DEQ review must ensure that the applicant proposes and conducts an adequate sampling program to characterize the material. Sampling programs should be based on an understanding of the historical site use, processes that were used at the site, spatial variability of site soils, and potential chemicals that were handled, used, or stored at the site. Sampling programs should include: how samples are collected (in-situ or ex-situ), where samples are collected to obtain representative results, types of samples collected (discrete or composite), the number of samples collected, and the constituents the samples are being analyzed for. The sampling program should depend on the size, condition, spatial variability of the soils, and history of the area the generator will excavate (or has excavated).

Because designing a sampling program to collect representative data for heterogeneous materials is potentially complex, DEQ staff should refer generators to sampling guidance such as EPA

2 DEQ, 2015. Conducting Contained-In Determinations for Environmental Media, Internal Management Directive. https://www.oregon.gov/deq/Filtered%20Library/IMDEnvMediaContainedinDet.pdf

https://www.oregon.gov/deq/Filtered%20Library/IMDEnvMediaContainedinDet.pdf

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(1986)3, EPA (2002)4, ITRC (2012)5 or to an experienced consultant when asked “how many samples should I collect?” during the pre-application period.

Examples of site considerations:

An applicant would need to collect fewer samples along a long stretch of highway through a single land use (such as agricultural fields with similar crops) than in areas where land use changes frequently.

Materials from agricultural lands should be tested for metals and pesticides/herbicides at a minimum. Materials from a facility whose history is uncertain may require testing for a larger list of analytes. Historical site information may be available in an environmental site assessment conducted in accordance with standard practices (for instance, ASTM E1903)6.

If the material is sediment that is being dredged and will be placed upland, DEQ Materials Management staff should work with DEQ Water Quality staff to determine if sampling done for the 401 water quality certification or dredging permits is sufficient to adequately characterize the sediment that will be placed upland.

7.3.c. Compare chemical concentrations to clean fill screening levels Once an appropriate sampling and analysis program has been completed, the results should be compared to clean fill screening levels. These levels are provided in Tables 1 and 2. When reviewing the results, make sure the laboratory method detection limit (MDL) is lower than the screening table value.

If the contaminant concentrations in the material do not exceed clean fill screening levels defined in the tables, the material is clean fill, provided the other criteria described in this IMD are also met, such as absence of staining or odor.

Note that the material may be clean fill even if there are some exceedances of these screening levels. For instance, if an appropriate statistical analysis7 demonstrates that the concentration of the contaminants are very close to clean fill screening values, DEQ may determine that the material can be considered to be clean fill in certain cases.

If a clean fill determination cannot be made, the party may contact DEQ to discuss other options, such as a permit exemption, disposal under a solid waste letter authorization, and disposal at a permitted landfill.

3 EPA, 1986. Test Methods for Evaluating Solid Waste, Physical/Chemical Methods (SW-846), Chapter 9, https://www.epa.gov/sites/production/files/2015-10/documents/chap9_0.pdf 4 EPA, 2002. Guidance on Choosing a Sampling Design for Environmental Data Collection, EPA QA/G-5S. https://www.epa.gov/sites/production/files/2015-06/documents/g5s-final.pdf 5 ITRC, 2012. Incremental Sampling Methodology, Technical and Regulatory Guidance. February. https://www.itrcweb.org/ism-1/pdfs/ISM-1_021512_Final.pdf 6 ASTM, 2011. Standard Practice for Environmental Site Assessments: Phase II Environmental Site Assessment Process, E1903-11. http://www.astm.org/Standards/E1903.htm 7Calculating a 90% Upper Confidence Limit is usually an appropriate statistical method. https://www.epa.gov/land-research/proucl-software

https://www.epa.gov/sites/production/files/2015-10/documents/chap9_0.pdf

https://www.epa.gov/sites/production/files/2015-06/documents/g5s-final.pdf

https://www.itrcweb.org/ism-1/pdfs/ISM-1_021512_Final.pdf

http://www.astm.org/Standards/E1903.htm

https://www.epa.gov/land-research/proucl-software

https://www.epa.gov/land-research/proucl-software

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Derivation of clean fill screening levels

8.1. Table 1 The values in Table 1 are based on the following: • DEQ’s technical report on background metals concentrations in soil8 • DEQ and EPA ecological screening levels9,10 • Ecological screening benchmarks developed by Oak Ridge National Laboratory11 • DEQ RBCs for residential soils12 • EPA RSLs for residential soils13 • Calculations based on USGS data14 In the case of background metals concentrations exceeding human health or ecological screening values, the background metal values are shown. Otherwise, the lowest of human or ecological screening values are used. In the case of metals for which background concentration levels are not available, DEQ used data compiled by USGS to calculate an estimated background value. DEQ used ProUCL to calculate a nonparametric 95% Upper Prediction Limit. The background concentration of lead for the Portland Basin appears to include anthropogenic influences (it is 79 mg/kg compared to no more than about 36 mg/kg in the rest of the state). Therefore, DEQ used the background lead concentration from the South Willamette Basin province as a background concentration for lead (28 mg/kg) for the Portland Basin.

8.2. Table 2 Values in Table 2 are based on the lowest of the following: • Residential soil concentrations from DEQ’s Risk-Based Decision Making table • EPA’s residential soil Regional Screening Level

8 DEQ. 2013. Development of Oregon Background Metals Concentrations in Soil, Technical Report. March. https://www.oregon.gov/deq/FilterDocs/DebORbackgroundMetal.pdf 9 DEQ, 1998. Guidance for Ecological Risk Assessment: Levels I, II, III, IV. April. https://www.oregon.gov/deq/FilterDocs/GuidanceEcologicalRisk.pdf 10 EPA, Interim Ecological Soil Screening Level Documents. Website accessed September 6, 2018: https://www.epa.gov/chemical-research/interim-ecological-soil-screening-level-documents 11 Oak Ridge National Laboratory, https://www.lanl.gov/environment/protection/eco-risk-assessment.php 12 DEQ, 2018. Risk-Based Concentrations for Individual Chemicals. May. https://www.oregon.gov/deq/FilterDocs/RBDMTable.pdf 13 EPA, 2018. Regional Screening Levels (RSLs) – Generic Tables. May. http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/index.htm 14 USGS, 2013. Geochemical and Mineralogical Data for Soils of the Conterminous United States. https://pubs.usgs.gov/ds/801/pdf/ds801.pdf

https://www.oregon.gov/deq/FilterDocs/DebORbackgroundMetal.pdf

https://www.oregon.gov/deq/FilterDocs/GuidanceEcologicalRisk.pdf

https://www.epa.gov/chemical-research/interim-ecological-soil-screening-level-documents

https://www.lanl.gov/environment/protection/eco-risk-assessment.php

https://www.oregon.gov/deq/FilterDocs/RBDMTable.pdf

http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/index.htm

https://pubs.usgs.gov/ds/801/pdf/ds801.pdf

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• EPA’s risk-based soil screening levels (SSL) for protection of groundwater, multiplied by 60. EPA uses a dilution attenuation factor (DAF) of 1 in the calculation of their SSLs; DEQ uses a default DAF of 60. Therefore the EPA SSL is multiplied by 60 to be consistent with DEQ methodology.

• For chemicals where DEQ and EPA have both calculated a screening level for groundwater protection, the DEQ level is used.

• DEQ’s Ecological Screening Level Values • EPA’s Ecological Soil Screening Levels • Ecological screening benchmarks developed by Oak Ridge National Laboratory15

8.3. Modifications If any of the references screening levels are updated and the clean fill guidance has not been updated to reflect the new screening levels, generators can calculate their own, updated, clean fill screening levels based on the methods discussed above.

Review Schedule This Directive and its referenced clean fill screening tables should be reviewed and updated when DEQ or EPA risk-based screening levels change.

15 Oak Ridge National Laboratory, https://www.lanl.gov/environment/protection/eco-risk-assessment.php

https://www.lanl.gov/environment/protection/eco-risk-assessment.php

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Record of Revisions to IMD

Revision Date Changes Editor 0 07/15/2014 New document Bill Mason

1 07/23/2014 a. Corrected URL in footnote 1 b. Corrected OAR reference on page 3

Bill Mason

2 07/12/2018 a. Incorporated new RBCs, RSLs and SSLs

b. Updated formatting c. See Section 6 for all changes

Heather Kuoppamaki

3 11/7/2018 Grammatical/typographical review Julie Miller

4 4/3/2019 Minor edits in Tables 1 and 2. Fix footnotes in Table 1, remove Chromium III from Table 2

Heather Kuoppamaki

5 6/17/2019 Minor edits in Tables 1 and 2. Add CAS numbers and BaP equivalents to Table 2.

Heather Kuoppamakirecordof

Statewide

Elements

Clean Fill Value

Basin and Range

Cascade Range

Coast Range

Deschutes-Columbia Plateau

High Lava Plains

Klamath Mountains

South Willamette

ValleyAntimony 0.86 1.3d d 0.67 0.55 1.3 0.35 0.59 1.3 d 0.39 0.56 aArsenic 12 14 19 12 6.8 7.2 12 17 18 8.8 aBarium 790 950 630 840 700 790 630 970 730 790 aBeryllium 2.4 2.6 2.1 2.8 2.6 2.6 1.4 2 2.6 2 aBismuth 20 cCadmium 0.81 0.69 0.54 0.54 0.4 0.78 0.52 N/A 1.6 0.63 aChromium (total) 100 190 200 240 170 140 890 120 100 76 aCobalt 43 bCopper 110 120 73 100 29 62 110 50 140 34 aLead 29 21 34 34 18 21 36 30 28 28 ** aLithium 35 bManganese 1,600 1,800 2,100 2,100 1,300 1,500 3,000 1,200 2,900 1,800 aMercury 0.28 1.4 0.24 0.11 0.04 0.06 0.17 0.75 0.07 0.23 aMolybdenum 2.1 bNickel 66 92 110 160 78 75 630 53 50 47 aSelenium 0.41 0.93 0.52 1.5 0.46 0.54 0.8 0.49 0.68 0.71 aSilver 0.42 0.51 0.17 0.41 0.82 0.68 0.16 2.2 0.33 0.82 aStrontium (stable) 4,700 bThallium 0.22 N/A 2.8 5.4 4.6 0.21 0.31 N/A 5.7 5.2 aTin (inorganic) 50 cUranium 5 cVanadium 270 400 280 260 300 220 290 190 370 180 aZinc 130 160 170 140 130 140 140 120 200 180 aNotes:

Last updated by Heather Kuoppamaki, DEQ-NWR, on June 17, 2019

Table 1 - Clean fill screening levels for province specific and background metals. All concentrations in mg/kg

NotePortland Basin

a - Table 4, Development of Oregon Background Metals Concentrations in Soil, Technical Report, DEQ (2013), https://www.oregon.gov/deq/FilterDocs/DebORbackgroundMetal.pdf. Background concentrations (a or d), when available, are used for the clean fill value. When background concentrations are not available, risk screening values are used.b - 95% Upper Prediction Limit calculated using USGS data for Oregon, Smith, D.B., Cannon, W.F., Woodruff, L.G., Solano, Federico, Kilburn, J.E., and Fey, D.L., 2013, Geochemical and mineralogical data for soils of the conterminous United States: U.S. Geological Survey Data Series 801, 19 p., http://pubs.usgs.gov/ds/801/c - Table 1, Guidance for Ecological Risk Assessment, Level II Screening Level Values, DEQ (2001), https://www.oregon.gov/deq/FilterDocs/GuidanceEcologicalRisk.pdf. Only used if ecotoxicological benchmarks from Oak Ridge National Laboratory are not available.

Blue Mountains

Owyhee Uplands

d - Ecotoxicological screening benchmarks developed by Oak Ridge National Laboratory: https://www.lanl.gov/environment/protection/eco-risk-assessment.php e - Regional Screening Levels, EPA (May 2018), Residential soil. http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/index.htm* - Province boundaries are presented in Figure 1

** - The background concentration of lead for the Portland Basin appears to include anthropogenic influences (it is 79 mg/kg compared to no more than about 36 mg/kg in the rest of the state). Therefore, DEQ used the background lead concentration from the South Willamette Basin province as a background concentration for lead for the Portland Basin.

Province* Background / Clean Fill Value

Chemical Name CAS Clean Fill Value Note

Acenaphthene 83-32-9 0.25 gAcenaphthylene 208-96-8 120 gAcephate 30560-19-1 0.32 bAcetaldehyde 75-07-0 0.031 bAcetochlor 34256-82-1 17 bAcetone 67-64-1 1.2 gAcetone Cyanohydrin 75-86-5 2,800,000 aAcetonitrile 75-05-8 1.6 bAcetophenone 98-86-2 35 bAcetylaminofluorene, 2- 53-96-3 0.0043 bAcrolein (Propenal) 107-02-8 0.0005 bAcrylamide 79-06-1 0.00066 bAcrylic Acid 79-10-7 0.025 bAcrylonitrile 107-13-1 0.00036 dAdiponitrile 111-69-3 8,500,000 aAlachlor 15972-60-8 0.052 bAldicarb 116-06-3 0.29 bAldicarb Sulfone 1646-88-4 0.26 bAldrin 309-00-2 0.023 dAllyl Alcohol 107-18-6 0.0025 bAllyl Chloride 107-05-1 0.014 bAluminum Phosphide 20859-73-8 31 aAmetryn 834-12-8 9.6 bAminobiphenyl, 4- 92-67-1 0.0009 bAminophenol, m- 591-27-5 37 bAminophenol, o- 95-55-6 1.8 bAminophenol, p- 123-30-8 9 bAmitraz 33089-61-1 160 aAmmonium Perchlorate 7790-98-9 55 aAmmonium polyphosphate 68333-79-9 3,800,000 aAmmonium Sulfamate 7773-06-0 16,000 aAmyl Alcohol, tert- 75-85-4 0.078 bAniline 62-53-3 0.28 bAnthracene 120-12-7 6.8 gAnthraquinone, 9,10- 84-65-1 0.84 bAntimony Pentoxide 1314-60-9 39 aAntimony Tetroxide 1332-81-6 31 aAntimony Trioxide 1309-64-4 280,000 aAroclor 1016 12674-11-2 1.1 gAroclor 1221 11104-28-2 0.0048 bAroclor 1232 11141-16-5 0.0048 bAroclor 1242 53469-21-9 0.041 gAroclor 1248 12672-29-6 0.0073 gAroclor 1254 11097-69-1 0.041 gAroclor 1260 11096-82-5 0.24 aAroclor 5460 11126-42-4 35 aArsenic III 7440-38-2 10 eArsine 7784-42-1 0.27 aAsulam 3337-71-1 11 bAtrazine 1912-24-9 0.012 bAuramine 492-80-8 0.037 b

Table 2 - Clean fill screening levels for organics and other selected constituents. All concentrations in mg/kg



Avermectin B1 65195-55-3 25 aAzinphos-methyl 86-50-0 1 bAzobenzene 103-33-3 0.056 bAzodicarbonamide 123-77-3 410 bBenfluralin 1861-40-1 56 bBenomyl 17804-35-2 51 bBensulfuron-methyl 83055-99-6 60 bBentazon 25057-89-0 7.2 bBenzaldehyde 100-52-7 0.25 bBenzene 71-43-2 0.023 dBenzenediamine-2-methyl sulfate, 1,4- 6369-59-1 0.013 bBenzenethiol (thiophenol) 108-98-5 0.66 bBenzidine 92-87-5 0.000038 dBenzo(a)anthracene 56-55-3 0.73 gBenzo(a)pyrene (BaP equivalents) 50-32-8 0.11 aBenzo(b)fluoranthene 205-99-2 1.1 aBenzo(g,h,i)perylene 191-24-2 25 gBenzo(j)fluoranthene 205-82-3 0.42 aBenzo(k)fluoranthene 207-08-9 11 aBenzoic Acid 65-85-0 1 gBenzotrichloride 98-07-7 0.0004 bBenzyl Alcohol 100-51-6 29 bBenzyl Chloride 100-44-7 0.0059 bBidrin (Dicrotophos) 141-66-2 0.0084 bBifenox 42576-02-3 46 bBiphenthrin 82657-04-3 950 aBiphenyl, 1,1'- 92-52-4 0.52 bBis(2-chloro-1-methylethyl) ether (Bis(2-chloroisopropyl) ether) 108-60-1 16 b

Bis(2-chloroethoxy)methane 111-91-1 0.78 bBis(2-chloroethyl)ether (dichloroethyl ether) 111-44-4 0.00019 dBis(2-ethylhexyl)phthalate (DEHP) 117-81-7 0.02 gBis(chloromethyl)ether 542-88-1 0.000001 bBisphenol A 80-05-7 3,200 aBoron And Borates Only 7440-42-8 0.5 eBoron Trichloride 10294-34-5 160,000 aBoron Trifluoride 7637-07-2 3,100 aBromate 15541-45-4 0.051 bBromine 7726-95-6 10 eBromo-2-chloroethane, 1- 107-04-0 0.00013 bBromo-3-fluorobenzene, 1- 1073-06-9 0.28 bBromo-4-fluorobenzene, 1- 460-00-4 0.26 bBromoaniline, 4- 106-40-1 100 eBromobenzene 108-86-1 2.5 bBromochloromethane 74-97-5 1.3 bBromodichloromethane 75-27-4 0.002 dBromoform (tribromomethane) 75-25-2 0.046 dBromomethane 74-83-9 0.083 dBromophos 2104-96-3 9 bBromopropane, 1- 106-94-5 3.8 bBromoxynil 1689-84-5 0.031 b



Bromoxynil Octanoate 1689-99-2 0.13 bButadiene, 1,3- 106-99-0 0.00059 bButanoic acid, 4-(2,4-dichlorophenoxy)- 94-82-6 25 bButanol, N- 71-36-3 25 bButyl alcohol, sec- 78-92-2 300 bButyl benzyl phthlate 85-68-7 14 bButylate 2008-41-5 27 bButylated hydroxyanisole 25013-16-5 17 bButylated hydroxytoluene 128-37-0 6 bButylbenzene, n- 104-51-8 190 bButylbenzene, sec- 135-98-8 350 bButylbenzene, tert- 98-06-6 96 bButylphthalyl Butylglycolate 85-70-1 19,000 bCacodylic Acid 75-60-5 6.6 bCalcium Cyanide 592-01-8 78 aCalcium pyrophosphate 7790-76-3 3,800,000 aCaprolactam 105-60-2 150 bCaptafol 2425-06-1 0.043 bCaptan 133-06-2 1.3 bCarbaryl 63-25-2 100 bCarbazole 86-74-8 79 gCarbofuran 1563-66-2 2.2 bCarbon Disulfide 75-15-0 0.81 gCarbon Tetrachloride 56-23-5 0.013 dCarbonyl Sulfide 463-58-1 31 bCarbosulfan 55285-14-8 72 bCarboxin 5234-68-4 60 bCeric oxide 1306-38-3 1,300,000 aChloral Hydrate 302-17-0 24 bChloramben 133-90-4 4.2 bChloranil 118-75-2 0.009 bChloraniline, 3- 108-42-9 20 eChlordane, alpha- 5103-71-9 0.27 gChlordane, gamma- 5103-74-2 2.2 gChlordane, technical 57-74-9 0.91 dChlordecone (Kepone) 143-50-0 0.0072 bChlorfenvinphos 470-90-6 1.9 bChlorimuron, Ethyl- 90982-32-4 36 bChlorine 7782-50-5 0.0084 bChlorine Dioxide 10049-04-4 2,300 aChlorite (Sodium Salt) 7758-19-2 2,300 aChloro-1,1-difluoroethane, 1- 75-68-3 3,100 bChloro-1,3-butadiene, 2- (Chloroprene) 126-99-8 0.00059 bChloro-2-methylaniline HCl, 4- 3165-93-3 0.009 bChloro-2-methylaniline, 4- 95-69-2 0.024 bChloroacetaldehyde, 2- 107-20-0 0.0035 bChloroacetamide 79-07-2 2 eChloroacetophenone, 2- 532-27-4 43,000 aChloroaniline, p- (4-Chloroaniline) 106-47-8 0.0096 bChlorobenzene 108-90-7 2.4 gChlorobenzene sulfonic acid, p- 98-66-8 28 b



Chlorobenzilate 510-15-6 0.06 bChlorobenzoic Acid, p- 74-11-3 7.8 bChlorobenzotrifluoride, 4- 98-56-6 7.2 bChlorobutane, 1- 109-69-3 16 bChlorodibromomethane(dibromochloromethane) 124-48-1 0.0024 d

Chlorodifluoromethane 75-45-6 2,600 bChloroethanol, 2- 107-07-3 4.9 bChloroform 67-66-3 0.0034 dChloromethane 74-87-3 2.2 dChloromethyl Methyl Ether 107-30-2 0.000084 bChloronaphthalene, Beta- 91-58-7 230 bChloronitrobenzene, o- 88-73-3 0.013 bChloronitrobenzene, p- 100-00-5 0.066 bChlorophenol, 2- 95-57-8 0.39 gChlorophenol, 3- 108-43-0 7 eChlorophenol, 4- 106-48-9 50 eChloropicrin 76-06-2 0.015 bChlorothalonil 1897-45-6 3 bChlorotoluene, o- 95-49-8 14 bChlorotoluene, p- 106-43-4 14 bChlorozotocin 54749-90-5 0.0000043 bChlorpropham 101-21-3 38 bChlorpyrifos 2921-88-2 7.2 bChlorpyrifos Methyl 5598-13-0 32 bChlorsulfuron 64902-72-3 50 bChlorthal-dimethyl 1861-32-1 9 bChlorthiophos 60238-56-4 4.4 bChromium (VI) 18540-29-9 0.04 bChrysene 218-01-9 3.1 gClofentezine 74115-24-5 820 aCopper Cyanide 544-92-3 390 aCresol, m- (3-Methylphenol) 108-39-4 0.69 gCresol, o- (2-Methylphenol) 95-48-7 0.67 gCresol, p- 106-44-5 90 bCresol, p-chloro-m- 59-50-7 100 bCresols 1319-77-3 78 bCrotonaldehyde, trans- 123-73-9 0.00049 bCumene 98-82-8 96 dCupferron 135-20-6 0.037 bCyanazine 21725-46-2 0.0025 bCyanogen 460-19-5 78 aCyanogen Bromide 506-68-3 7,000 aCyanogen Chloride 506-77-4 3,900 aCyclohexane 110-82-7 780 bCyclohexane, 1,2,3,4,5-pentabromo-6-chloro- 87-84-3 0.96 bCyclohexanone 108-94-1 20 bCyclohexene 110-83-8 2.8 bCyclohexylamine 108-91-8 60 bCyfluthrin 68359-37-5 1,600 aCyhalothrin/karate 68085-85-8 63 a



Cyromazine 66215-27-8 150 bDalapon 75-99-0 7.2 bDaminozide (Alar) 1596-84-5 0.057 bDecabromodiphenyl ether, 2,2',3,3',4,4',5,5',6,6'- (BDE-209) 1163-19-5 440 a

Demeton 8065-48-3 2.5 aDi(2-ethylhexyl)adipate 103-23-1 280 bDiallate 2303-16-4 0.048 bDiammonium phosphate 7783-28-0 3,800,000 aDiazinon 333-41-5 3.9 bDibenz(a,h)anthracene 53-70-3 0.11 aDibenzo(a,e)pyrene 192-65-4 0.042 aDibenzofuran 132-64-9 0.002 eDibenzothiophene 132-65-0 72 bDibromo-3-chloropropane, 1,2- 96-12-8 0.0000084 bDibromobenzene, 1,3- 108-36-1 0.31 bDibromobenzene, 1,4- 106-37-6 7.2 bdibromoethane, 1,2- (EDB) 106-93-4 0.00012 dDibromomethane (Methylene Bromide) 74-95-3 0.13 bDibutyl phthalate (Di-n-butyl phthalate) 84-74-2 0.011 gDibutyltin Compounds E1790660 19 aDicalcium phosphate 7757-93-9 3,800,000 aDicamba 1918-00-9 9 bDichloro-2-butene, 1,4- 764-41-0 0.00004 bDichloro-2-butene, cis-1,4- 1476-11-5 0.000037 bDichloro-2-butene, trans-1,4- 110-57-6 0.000037 bDichloroacetic Acid 79-43-6 0.019 bDichloroaniline, 2,4- 554-00-7 100 eDichloroaniline, 3,4- 95-76-1 10 eDichlorobenzene, 1,2- 95-50-1 0.92 gDichlorobenzene, 1,3- 541-76-1 0.74 gDichlorobenzene, 1,4- 106-46-7 0.057 dDichlorobenzidine, 3,3'- 91-94-1 0.17 dDichlorobenzophenone, 4,4'- 90-98-2 28 bDichlorodifluoromethane (Freon-12) 75-71-8 18 bDichlorodiphenyldichloroethane, 4,4- (DDD) 72-54-8 0.0063 gDichlorodiphenyldichloroethene, 4,4- (DDE) 72-55-9 0.01 eDichlorodiphenyltrichloroethane, 4,4- (DDT) 50-29-3 0.01 eDichloroethane, 1,1- 75-34-3 0.044 dDichloroethane, 1,2- (EDC) 107-06-2 0.0028 dDichloroethylene, 1,1- 75-35-4 6.7 dDichloroethylene, 1,2- (mixture) 2,500 eDichloroethylene, 1,2-cis- 156-59-2 0.63 dDichloroethylene, 1,2-trans- 156-60-5 7 dDichloromethane 75-09-2 0.14 dDichlorophenol, 2,4- 120-83-2 1.4 bDichlorophenol, 3,4- 95-77-2 20 eDichlorophenoxy Acetic Acid, 2,4- 94-75-7 2.3 dDichloropropane, 1,2- 78-87-5 0.017 bDichloropropane, 1,3- 142-28-9 7.8 bDichloropropanol, 2,3- 616-23-9 0.78 b



Dichloropropene, 1,3- 542-75-6 0.01 bDichlorvos 62-73-7 0.0049 bDicyclopentadiene 77-73-6 0.13 bDieldrin 60-57-1 0.0045 gDiethanolamine 111-42-2 0.49 bDiethyl phthalate 84-66-2 100 eDiethylene Glycol Monobutyl Ether 112-34-5 7.8 bDiethylene glycol monoethyl ether 111-90-0 14 bDiethylformamide 617-84-5 0.25 bDiethylstilbestrol 56-53-1 0.0016 aDifenzoquat 43222-48-6 5,200 aDiflubenzuron 35367-38-5 20 bDifluoroethane, 1,1- (DFE) 75-37-6 1,700 bDifluoropropane, 2,2- 420-45-1 8,400 bDihydrosafrole 94-58-6 0.011 bDiisopropyl ether (DIPE) 108-20-3 22 bDiisopropyl Methylphosphonate 1445-75-6 27 bDimagnesium phosphate 7782-75-4 3,800,000 aDimethipin 55290-64-7 5.8 bDimethoate 60-51-5 0.59 bDimethoxybenzidine, 3,3'- 119-90-4 0.0035 bDimethyl methylphosphonate 756-79-6 0.58 bDimethyl phthalate 131-11-3 10 gDimethylamino azobenzene [p-] 60-11-7 0.0013 bDimethylaniline HCl, 2,4- 21436-96-4 0.0072 bDimethylaniline, 2,4- 95-68-1 0.013 bDimethylaniline, N,N- 121-69-7 0.054 bDimethylbenz(a)anthracene, 7,12- 57-97-6 0.00046 aDimethylbenzidine, 3,3'- 119-93-7 0.0026 bDimethylformamide 68-12-2 0.72 bDimethylhydrazine, 1,1- 57-14-7 0.000056 bDimethylhydrazine, 1,2- 540-73-8 0.00000039 bDimethylphenol, 2,4- 105-67-9 20 eDimethylphenol, 2,6- 576-26-1 0.78 bDimethylphenol, 3,4- 95-65-8 1.3 bDimethylterephthalate 120-61-6 29 bDimethylvinylchloride 513-37-1 0.0066 bDi-n-hexylphthalate 84-75-3 3,100 eDinitrobenzene, 1,2- 528-29-0 0.11 bDinitrobenzene, 1,3- 99-65-0 0.072 gDinitrobenzene, 1,4- 100-25-4 0.11 bDinitro-o-cresol, 4,6- 534-52-1 0.16 bDinitro-o-cyclohexyl Phenol, 4,6- 131-89-5 46 bDinitrophenol, 2,4- 51-28-5 2.6 bDinitrotoluene Mixture, 2,4/2,6- E1615210 0.009 bDinitrotoluene, 2,4- 121-14-2 0.019 bDinitrotoluene, 2,6- 606-20-2 0.0089 dDinitrotoluene, 2-Amino-4,6- 35572-78-2 1.8 bDinitrotoluene, 4-Amino-2,6- 19406-51-0 1.8 bDinitrotoluene, Technical grade 25321-14-6 0.0084 bDinoseb 88-85-7 7.8 b



Di-N-propylnitrosamine (N-nitrosodi-N-propylamine) 621-64-7 0.00094 d

Dioxane, 1,4- 123-91-1 0.0023 dDiphenamid 957-51-7 310 bDiphenyl Ether 101-84-8 0.2 bDiphenyl Sulfone 127-63-9 2.2 bDiphenylamine 122-39-4 10 gDiphenylhydrazine, 1,2- 122-66-7 0.015 bDipotassium phosphate 7758-11-4 3,800,000 aDiquat 85-00-7 50 bDirect Black 38 1937-37-7 0.076 aDirect Blue 6 2602-46-2 0.073 aDirect Brown 95 16071-86-6 0.081 aDisodium phosphate 7558-79-4 3,800,000 aDisulfoton 298-04-4 0.056 bDithiane, 1,4- 505-29-3 5.8 bDiuron 330-54-1 0.9 bDodine 2439-10-3 130 bEndosulfan, (alpha-beta) 0.64 gEndothall 145-73-3 5.5 bEndrin 72-20-8 0.0014 gEpichlorohydrin 106-89-8 0.027 bEpoxybutane, 1,2- 106-88-7 0.55 bEPTC 759-94-4 24 bEthanol 64-17-5 4,000 eEthanol, 2-(2-methoxyethoxy)- 111-77-3 9.6 bEthephon 16672-87-0 1.3 bEthion 563-12-2 0.51 bEthoxyethanol Acetate, 2- 111-15-9 1.5 bEthoxyethanol, 2- 110-80-5 4.1 bEthyl Acetate 141-78-6 1.9 bEthyl Acrylate 140-88-5 0.19 bEthyl Chloride (Chloroethane) 75-00-3 310 dEthyl Ether (Diethyl ether) 60-29-7 53 bEthyl Methacrylate 97-63-2 9 bEthylbenzene 100-41-4 0.22 dEthylene Cyanohydrin 109-78-4 17 bEthylene Diamine 107-15-3 25 bEthylene Glycol 107-21-1 490 bEthylene Glycol Monobutyl Ether 111-76-2 25 bEthylene Oxide 75-21-8 0.0000084 bEthylene Thiourea 96-45-7 0.022 bEthyleneimine 151-56-4 0.0000031 bEthylphthalyl Ethyl Glycolate 84-72-0 7,800 bEthyl-p-nitrophenyl phosphonate (EPN) 2104-64-5 0.17 bFenamiphos 22224-92-6 0.0002 eFenpropathrin 39515-41-8 170 bFenvalerate 51630-58-1 1,600 aFluometuron 2164-17-2 11 bFluoranthene 206-44-0 10 gFluorene 86-73-7 3.7 g



Fluoride 16984-48-8 3,100 aFluorine (Soluble Fluoride) 7782-41-4 30 eFluridone 59756-60-4 5,100 aFlurprimidol 56425-91-3 190 bFlusilazole 85509-19-9 130 aFlutolanil 66332-96-5 2,500 bFluvalinate 69409-94-5 630 aFolpet 133-07-3 23 bFomesafen 72178-02-0 9.6 bFonofos 944-22-9 2.8 bFormaldehyde 50-00-0 0.002 dFormic Acid 64-18-6 0.0078 bFosetyl-AL 39148-24-8 40,000 bFuran 110-00-9 0.44 bFurazolidone 67-45-8 0.0023 bFurfural 98-01-1 0.49 bFurium 531-82-8 0.0041 bFurmecyclox 60568-05-0 0.072 bGeneric Diesel/Heating Oil 1,100 cGeneric Gasoline 31 dGeneric Mineral/Insulating Oil 2,800 cGlufosinate, Ammonium 77182-82-2 1.6 bGlutaraldehyde 111-30-8 24 bGlycidyl 765-34-4 0.02 bGlyphosate 1071-83-6 530 bGuanidine 113-00-8 2.7 bGuanidine Chloride 50-01-1 1,300 aGuanidine Nitrate 506-93-4 9 bHaloxyfop, Methyl 69806-40-2 0.5 bHeptachlor 76-44-8 0.017 dHeptachlor Epoxide 1024-57-3 0.0042 dHeptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 0.13 aHeptanal, n- 111-71-7 0.084 bHeptane, N- 142-82-5 1 eHexabromobenzene 87-82-1 14 bHexabromodiphenyl ether, 2,2',4,4',5,5'- (BDE-153) 68631-49-2 13 a

Hexachlorobenzene 118-74-1 0.018 dHexachlorobiphenyl, 2,3,3',4,4',5- (PCB 156) 38380-08-4 0.1 bHexachlorobiphenyl, 2,3,3',4,4',5'- (PCB 157) 69782-90-7 0.1 bHexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 0.1 bHexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 0.0001 bHexachlorobutadiene 87-68-3 0.016 bHexachlorocyclohexane, (technical-BHC) 608-73-1 0.009 bHexachlorocyclohexane, alpha- (alpha-HCH or alpha-BHC) 319-84-6 0.0063 d

Hexachlorocyclohexane, Beta- (beta-BHC) 319-85-7 0.009 bHexachlorocyclohexane, gamma- (gamma-BHC or Lindane) 58-89-9 0.0095 g

Hexachlorocyclopentadiene 77-47-4 0.078 bHexachlorodibenzo-p-dioxin, Mixture 0 0.0001 a



Hexachloroethane 67-72-1 0.022 dHexachlorophene 70-30-4 19 aHexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) 121-82-4 0.016 bHexamethylene Diisocyanate, 1,6- 822-06-0 0.013 bHexamethylphosphoramide 680-31-9 0.11 bHexane, N- 110-54-3 600 bHexanedioic Acid 124-04-9 590 bHexanone, 2- 591-78-6 0.36 gHexazinone 51235-04-2 18 bHexythiazox 78587-05-0 30 bHydramethylnon 67485-29-4 1,100 aHydrazine 302-01-2 0.000013 bHydrazine Sulfate 10034-93-2 0.23 aHydrogen Chloride 7647-01-0 28,000,000 aHydrogen Cyanide 74-90-8 0.88 dHydrogen Fluoride 7664-39-3 3,100 aHydrogen Sulfide 7783-06-4 2,800,000 aHydroquinone 123-31-9 0.052 bImazalil 35554-44-0 0.9 bImazaquin 81335-37-7 1,400 bImazethapyr 81335-77-5 2,500 bIndeno[1,2,3-cd]pyrene 193-39-5 1.1 aIodine 7553-56-2 4 eIprodione 36734-19-7 13 bIsobutyl Alcohol 78-83-1 72 bIsophorone 78-59-1 1.6 bIsopropalin 33820-53-0 55 bIsopropanol 67-63-0 5 bIsopropyl Methyl Phosphonic Acid 1832-54-8 26 bIsoxaben 82558-50-7 120 bJP-7 E1737665 430,000,000 aLactofen 77501-63-4 280 bLactonitrile 78-97-7 0.049 bLead acetate 301-04-2 0.11 bLead Phosphate 7446-27-7 82 aLead subacetate 1335-32-6 0.12 bLewisite 541-25-3 0.0023 bLinuron 330-55-2 6.6 bLithium Perchlorate 7791-03-9 55 aMalathion 121-75-5 6 bMaleic Anhydride 108-31-6 23 bMaleic Hydrazide 123-33-1 130 bMalononitrile 109-77-3 0.025 bMancozeb 8018-01-7 46 bManeb 12427-38-2 8.4 b

MCPA ((4-chloro-2-methylphenoxy)acetic acid) 94-74-6 0.097 d

MCPB 94-81-5 1.6 bMCPP 93-65-2 0.28 bMephosfolan 950-10-7 0.16 bMepiquat Chloride 24307-26-4 12 b



Mercaptobenzothiazole, 2- 149-30-4 1.1 bMercuric Chloride (and other Mercury salts) 7487-94-7 23 aMercury (methyl) 22967-92-6 0.0002 eMerphos 150-50-5 2.3 aMerphos Oxide 78-48-8 0.084 bMetalaxyl 57837-19-1 20 bMethacrylonitrile 126-98-7 0.026 bMethamidophos 10265-92-6 0.013 bMethanol 67-56-1 250 bMethidathion 950-37-8 0.43 bMethomyl 16752-77-5 6.6 bMethoxy-5-nitroaniline, 2- 99-59-2 0.032 bMethoxychlor 72-43-5 5.1 gMethoxyethanol Acetate, 2- 110-49-6 0.025 bMethoxyethanol, 2- 109-86-4 0.35 bMethyl Acetate 79-20-9 250 bMethyl Acrylate 96-33-3 0.53 bMethyl Ethyl Ketone (2-Butanone) 78-93-3 72 bMethyl Hydrazine 60-34-4 0.000078 bMethyl Iodide 74-88-4 0.038 g

Methyl Isobutyl Ketone (4-methyl-2-pentanone) 108-10-1 9.7 g

Methyl Isocyanate 624-83-9 0.035 bMethyl Methacrylate 80-62-6 18 bMethyl Methanesulfonate 66-27-3 0.0096 bMethyl Parathion 298-00-0 0.44 bMethyl Phosphonic Acid 993-13-5 14 bMethyl Styrene (Mixed Isomers) 25013-15-4 2.3 bMethyl tert-Butyl Ether (MTBE) 1634-04-4 0.11 dMethyl-1,4-benzenediamine dihydrochloride, 2- 615-45-2 0.22 bMethyl-2-Pentanol, 4- 108-11-2 84 bMethyl-5-nitroaniline, 2- (5-Nitro-o-toluidine) 99-55-8 0.28 bMethylaniline Hydrochloride, 2- 636-21-5 0.016 bMethylarsonic acid 124-58-3 3.5 b

Methylbenzene,1-4-diamine monohydrochloride, 2- 74612-12-7 13 a

Methylbenzene-1,4-diamine sulfate, 2- 615-50-9 5.4 aMethylcholanthrene, 3- 56-49-5 0.0055 aMethylene-bis(2-chloroaniline), 4,4'- 101-14-4 0.11 bMethylene-bis(N,N-dimethyl) Aniline, 4,4'- 101-61-1 0.16 bMethylenebisbenzenamine, 4,4'- 101-77-9 0.013 bMethylenediphenyl Diisocyanate 101-68-8 850,000 aMethylnaphthalene, 1- 90-12-0 0.36 bMethylnaphthalene, 2- 91-57-6 11 bMethyl-N-nitro-N-nitrosoguanidine, N- 70-25-7 0.00019 bMethylstyrene, Alpha- 98-83-9 72 bMetolachlor 51218-45-2 190 bMetribuzin 21087-64-9 9 bMetsulfuron-methyl 74223-64-6 110 bMineral oils 8012-95-1 140,000 bMirex 2385-85-5 0.036 a



Molinate 2212-67-1 1 bMonoaluminum phosphate 13530-50-2 3,800,000 aMonoammonium phosphate 7722-76-1 3,800,000 aMonocalcium phosphate 7758-23-8 3,800,000 aMonochloramine 10599-90-3 7,800 aMonomagnesium phosphate 7757-86-0 3,800,000 aMonomethylaniline 100-61-8 0.84 bMonopotassium phosphate 7778-77-0 3,800,000 aMonosodium phosphate 7558-80-7 3,800,000 aMyclobutanil 88671-89-0 340 bN,N'-Diphenyl-1,4-benzenediamine 74-31-7 19 aNaled 300-76-5 1.1 bNaphtha, High Flash Aromatic (HFAN) 64742-95-6 2,300 aNaphthalene 91-20-3 0.077 dNaphthylamine, 2- 91-59-8 0.012 bNapropamide 15299-99-7 780 bNickel Acetate 373-02-4 2.7 bNickel Carbonate 3333-67-3 670 aNickel Carbonyl 13463-39-3 820 aNickel Hydroxide 12054-48-7 820 aNickel Oxide 1313-99-1 840 aNickel Refinery Dust E715532 820 aNickel Subsulfide 12035-72-2 0.41 aNickelocene 1271-28-9 670 aNitrate 14797-55-8 130,000 aNitrite 14797-65-0 7,800 aNitroaniline, 2- 88-74-4 4.8 bNitroaniline, 3- 99-09-2 70 eNitroaniline, 4- 100-01-6 0.096 bNitrobenzene 98-95-3 0.0055 bNitrocellulose 9004-70-0 780,000 bNitrofurantoin 67-20-9 37 bNitrofurazone 59-87-0 0.0032 bNitroglycerin 55-63-0 0.051 bNitroguanidine 556-88-7 29 bNitromethane 75-52-5 0.0084 bNitrophenol, 4- 100-02-7 7 eNitropropane, 2- 79-46-9 0.000032 bNitropyrene, 4- 57835-92-4 0.2 bNitrosodiethanolamine, N- 1116-54-7 0.00034 bNitrosodiethylamine, N- 55-18-5 0.0000037 bNitrosodimethylamine, N- 62-75-9 0.0000016 bNitroso-di-N-butylamine, N- 924-16-3 0.00033 b

Nitrosodiphenylamine, N- (Diphenylnitrosamine) 86-30-6 10 d

Nitrosomethylethylamine, N- 10595-95-6 0.000012 bNitrosomorpholine [N-] 59-89-2 0.00017 bNitroso-N-ethylurea, N- 759-73-9 0.000013 bNitroso-N-methylurea, N- 684-93-5 0.0000028 bNitrosopiperidine [N-] 100-75-4 0.00026 bNitrosopyrrolidine, N- 930-55-2 0.00084 b



Nitrotoluene, m- 99-08-1 0.096 bNitrotoluene, o- 88-72-2 0.018 bNitrotoluene, p- 99-99-0 0.24 bNonane, n- 111-84-2 4.5 bNorflurazon 27314-13-2 110 bOctabromodiphenyl Ether 32536-52-0 190 aOctahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) 2691-41-0 16 g

Octamethylpyrophosphoramide 152-16-9 0.58 bOctyl Phthalate, di-N- 117-84-0 0.91 gOryzalin 19044-88-3 0.9 bOxadiazon 19666-30-9 29 bOxamyl 23135-22-0 6.6 bOxyfluorfen 42874-03-3 2.6 bPaclobutrazol 76738-62-0 28 bPAHs - High Molecular Weight 0 1.1 fPAHs - Low Molecular Weight 0 29 fParaquat Dichloride 1910-42-5 72 bParathion 56-38-2 26 bPebulate 1114-71-2 27 bPendimethalin 40487-42-1 960 bPentabromodiphenyl Ether 32534-81-9 100 bPentabromodiphenyl ether, 2,2',4,4',5- (BDE-99) 60348-60-9 5.2 bPentachlorobenzene 608-93-5 1.4 bPentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 0.06 bPentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 0.06 bPentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 0.06 bPentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 0.06 bPentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 0.000018 bPentachloroethane 76-01-7 0.019 bPentachloronitrobenzene 82-68-8 0.09 bPentachlorophenol 87-86-5 0.066 dPentaerythritol tetranitrate (PETN) 78-11-5 1.7 bPentane, n- 109-66-0 600 bPerchlorate and perchlorate salts 14797-73-0 55 aPerfluorobutane sulfonic acid (PFBS) 375-73-5 7.8 bPerfluorobutanesulfonate 45187-15-3 7.8 bPermethrin 52645-53-1 3,200 aPhenacetin 62-44-2 0.58 bPhenanthrene 85-01-8 5.5 gPhenmedipham 13684-63-4 1,300 bPhenol 108-95-2 0.79 gPhenol, 2-(1-methylethoxy)-, methylcarbamate 114-26-1 1.5 bPhenothiazine 92-84-2 0.84 bPhenyl Isothiocyanate 103-72-0 0.1 bPhenylenediamine, m- 108-45-2 1.9 bPhenylenediamine, o- 95-54-5 0.01 bPhenylenediamine, p- 106-50-3 0.32 bPhenylmercuric Acetate 62-38-4 0.03 bPhenylphenol, 2- 90-43-7 25 bPhorate 298-02-2 0.2 b



Phosgene 75-44-5 0.31 aPhosmet 732-11-6 4.9 bPhosphine 7803-51-2 23 aPhosphoric Acid 7664-38-2 3,000,000 aPhosphorus, White 7723-14-0 0.09 bPhthalic Acid, P- 100-21-0 410 bPhthalic Anhydride 85-44-9 510 bPicloram 1918-02-1 23 bPicramic Acid (2-Amino-4,6-dinitrophenol) 96-91-3 0.078 bPicric Acid (2,4,6-Trinitrophenol) 88-89-1 5 bPirimiphos, Methyl 29232-93-7 0.049 bPolybrominated biphenyls 59536-65-1 0.018 aPolychlorinated biphenyls (TotalPCBs) 0.23 c

Polymeric Methylene Diphenyl Diisocyanate (PMDI) 9016-87-9 850,000 a

Polyphosphoric acid 8017-16-1 3,800,000 aPotassium Cyanide 151-50-8 160 aPotassium Perchlorate 7778-74-7 55 aPotassium Perfluorobutane Sulfonate 29420-49-3 1,300 aPotassium Silver Cyanide 506-61-6 390 aPotassium tripolyphosphate 13845-36-8 3,800,000 aProchloraz 67747-09-5 0.11 bProfluralin 26399-36-0 96 bPrometon 1610-18-0 7.2 bPrometryn 7287-19-6 54 bPropachlor 1918-16-7 9 bPropanil 709-98-8 2.7 bPropargite 2312-35-8 0.66 bPropargyl Alcohol 107-19-7 0.49 bPropazine 139-40-2 18 bPropham 122-42-9 13 bPropiconazole 60207-90-1 320 bPropionaldehyde 123-38-6 0.2 bPropyl benzene 103-65-1 72 bPropylene 115-07-1 360 bPropylene Glycol 57-55-6 4,900 bPropylene Glycol Dinitrate 6423-43-4 390,000 aPropylene Glycol Monomethyl Ether 107-98-2 39 bPropylene Oxide 75-56-9 0.0034 bPropyzamide 23950-58-5 72 bPyrene 129-00-0 10 gPyridine 110-86-1 0.41 bQuinalphos 13593-03-8 2.6 bQuinoline 91-22-5 0.0047 bQuizalofop-ethyl 76578-14-8 110 bRefractory Ceramic Fibers E715557 43,000,000 aResmethrin 10453-86-8 1,900 aRonnel 299-84-3 220 bRotenone 83-79-4 250 aSafrole 94-59-7 0.0035 b



Selenious Acid 7783-00-8 390 aSelenium Sulfide 7446-34-6 390 aSethoxydim 74051-80-2 840 bSilica (crystalline, respirable) 7631-86-9 4,300,000 aSilver Cyanide 506-64-9 7,800 aSimazine 122-34-9 0.018 bSodium acid pyrophosphate 7758-16-9 3,800,000 aSodium Acifluorfen 62476-59-9 130 bSodium aluminum phosphate (acidic) 7785-88-8 3,800,000 aSodium aluminum phosphate (anhydrous) 10279-59-1 3,800,000 aSodium aluminum phosphate (tetrahydrate) 10305-76-7 3,800,000 aSodium Azide 26628-22-8 310 aSodium Cyanide 143-33-9 78 aSodium Diethyldithiocarbamate 148-18-5 0.011 bSodium Fluoride 7681-49-4 3,900 aSodium Fluoroacetate 62-74-8 0.0049 bSodium hexametaphosphate 10124-56-8 3,800,000 aSodium Metavanadate 13718-26-8 78 aSodium Perchlorate 7601-89-0 55 aSodium polyphosphate 68915-31-1 3,800,000 aSodium trimetaphosphate 7785-84-4 3,800,000 aSodium tripolyphosphate 7758-29-4 3,800,000 aSodium Tungstate 13472-45-2 63 aSodium Tungstate Dihydrate 10213-10-2 63 aStirofos (Tetrachlorovinphos) 961-11-5 0.49 bStrychnine 57-24-9 3.9 bStyrene 100-42-5 1.2 gStyrene-Acrylonitrile (SAN) Trimer 190 aSulfolane 126-33-0 0.26 bSulfonylbis(4-chlorobenzene), 1,1'- 80-07-9 3.9 bSulfur Trioxide 7446-11-9 1,400,000 aSulfuric Acid 7664-93-9 1,400,000 aSulfurous acid, 2-chloroethyl 2-[4-(1,1-dimethylethyl)phenoxy]-1-methylethyl ester 140-57-8 0.9 b

Tebuthiuron 34014-18-1 23 bTemephos 3383-96-8 1,300 aTerbacil 5902-51-2 4.5 bTerbufos 13071-79-9 0.031 bTerbutryn 886-50-0 1.1 bTetrabromodiphenyl ether, 2,2',4,4'- (BDE-47) 5436-43-1 3.2 bTetrachloroaniline, 2,3,5,6- 3481-20-7 20 eTetrachlorobenzene, 1,2,3,4- 634-66-2 10 eTetrachlorobenzene, 1,2,4,5- 95-94-3 0.47 bTetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 0.038 aTetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 0.0037 bTetrachlorodibenzodioxin (TCDD), 2,3,7,8- (dioxin) 1746-01-6 0.00000029 g

Tetrachloroethane, 1,1,1,2- 630-20-6 0.013 bTetrachloroethane, 1,1,2,2- 79-34-5 0.0018 bTetrachloroethylene (PCE) 127-18-4 0.18 gTetrachlorophenol, 2,3,4,6- 58-90-2 11 b



Tetrachlorotoluene, p- alpha, alpha, alpha- 5216-25-1 0.00027 bTetraethyl Dithiopyrophosphate 3689-24-5 0.31 bTetraethyl lead 78-00-2 0.00028 bTetrafluoroethane, 1,1,1,2- 811-97-2 5,600 bTetrahydrofuran 109-99-9 45 bTetrapotassium phosphate 7320-34-5 3,800,000 aTetrasodium pyrophosphate 7722-88-5 3,800,000 aTetryl (Trinitrophenylmethylnitramine) 479-45-8 1.5 gThallic Oxide 1314-32-5 1.6 aThallium (I) Nitrate 10102-45-1 0.78 aThallium (Soluble Salts) 7440-28-0 0.78 aThallium Acetate 563-68-8 0.0025 bThallium Carbonate 6533-73-9 0.005 bThallium Chloride 7791-12-0 0.78 aThallium Selenite 12039-52-0 0.78 aThallium Sulfate 7446-18-6 1.6 aThifensulfuron-methyl 79277-27-3 16 bThiobencarb 28249-77-6 33 bThiocyanates E1790664 16 aThiocyanic Acid 463-56-9 16 a

Thiocyanomethylthio benzothiazole, 2- (TCMTB) 21564-17-0 200 b

Thiodiglycol 111-48-8 17 bThiofanox 39196-18-4 0.11 bThiophanate, Methyl 23564-05-8 0.34 bThiram 137-26-8 25 bTitanium Tetrachloride 7550-45-0 140,000 aToluene 108-88-3 23 gToluene-2,4-diisocyanate 584-84-9 0.015 bToluene-2,5-diamine 95-70-5 0.0078 bToluene-2,6-diisocyanate 91-08-7 0.016 bToluic Acid, p- 99-94-5 1.4 bToluidine, o- (Methylaniline, 2-) 95-53-4 0.12 bToluidine, p- 106-49-0 0.066 b

Total Petroleum Hydrocarbons (Aliphatic High) E1790670 140,000 b

Total Petroleum Hydrocarbons (Aliphatic Low) E1790666 520 aTotal Petroleum Hydrocarbons (Aliphatic Medium) E1790668 90 b

Total Petroleum Hydrocarbons (Aromatic High) E1790676 2,500 a

Total Petroleum Hydrocarbons (Aromatic Low) E1790672 1 bTotal Petroleum Hydrocarbons (Aromatic Medium) E1790674 1.4 bToxaphene 8001-35-2 0.36 dTralomethrin 66841-25-6 470 aTriacetin 102-76-1 27,000 bTriadimefon 43121-43-3 30 bTriallate 2303-17-5 0.06 bTrialuminum sodium tetra decahydrogenoctaorthophosphate (dihydrate) 15136-87-5 3,800,000 a

Triasulfuron 82097-50-5 13 bTribenuron-methyl 101200-48-0 3.7 b



Tribromobenzene, 1,2,4- 615-54-3 3.8 bTribromophenol, 2,4,6- 118-79-6 13 bTributyl Phosphate 126-73-8 1.5 bTributyltin Compounds E1790678 19 aTributyltin oxide (TBTO) 56-35-9 19 aTricalcium phosphate 7758-87-4 3,800,000 a

Trichloro-1,2,2-trifluoroethane, 1,1,2- (Freon 113) 76-13-1 1,600 b

Trichloroacetic Acid 76-03-9 0.013 bTrichloroaniline HCl, 2,4,6- 33663-50-2 0.44 bTrichloroaniline, 2,4,5- 636-30-6 20 eTrichloroaniline, 2,4,6- 634-93-5 0.22 bTrichlorobenzene, 1,2,3- 87-61-6 1.3 bTrichlorobenzene, 1,2,4- 120-82-1 0.2 bTrichloroethane, 1,1,1- 71-55-6 190 dTrichloroethane, 1,1,2- 79-00-5 0.0063 dTrichloroethylene (TCE) 79-01-6 0.013 dTrichlorofluoromethane (Freon 11) 75-69-4 52 gTrichlorophenol, 2,4,5- 95-95-4 4 eTrichlorophenol, 2,4,6- 88-06-2 2.4 dTrichlorophenoxyacetic Acid, 2,4,5- 93-76-5 4.1 bTrichlorophenoxypropionic acid, -2,4,5 93-72-1 3.7 bTrichloropropane, 1,1,2- 598-77-6 2.1 bTrichloropropane, 1,2,3- 96-18-4 0.000019 bTrichloropropene, 1,2,3- 96-19-5 0.019 bTricresyl Phosphate (TCP) 1330-78-5 900 bTridiphane 58138-08-2 7.8 bTriethylamine 121-44-8 0.26 bTriethylene Glycol 112-27-6 530 bTrifluoroethane, 1,1,1- 420-46-2 7,800 bTrifluralin 1582-09-8 5 bTrimagnesium phosphate 7757-87-1 3,800,000 aTrimethyl Phosphate 512-56-1 0.052 bTrimethylbenzene, 1,2,3- 526-73-8 4.9 bTrimethylbenzene, 1,2,4- 95-63-6 10 dTrimethylbenzene, 1,3,5- 108-67-8 11 dTrimethylpentene, 2,4,4- 25167-70-8 13 bTri-n-butyltin 688-73-3 4.9 bTrinitrobenzene, 1,3,5- 99-35-4 10 gTrinitrotoluene, 2,4,6- (TNT) 118-96-7 0.9 bTriphenylphosphine Oxide 791-28-6 90 bTripotassium phosphate 7778-53-2 3,800,000 aTris(1,3-Dichloro-2-propyl) Phosphate 13674-87-8 480 bTris(1-chloro-2-propyl)phosphate 13674-84-5 39 bTris(2,3-dibromopropyl)phosphate 126-72-7 0.0078 bTris(2-chloroethyl)phosphate 115-96-8 0.23 bTris(2-ethylhexyl)phosphate 78-42-2 170 aTrisodium phosphate 7601-54-9 3,800,000 aUranium (Soluble Salts) E715565 5 eUrethane (Ethyl carbamate) 51-79-6 0.00034 bVanadium Pentoxide 1314-62-1 460 a



Vernolate 1929-77-7 0.53 bVinclozolin 50471-44-8 0.96 bVinyl Acetate 108-05-4 5.2 bVinyl Bromide 593-60-2 0.0031 bVinyl Chloride 75-01-4 0.00057 dWarfarin 81-81-2 0.35 bXylene, m- 108-38-3 11 bXylene, o- 95-47-6 1 eXylene, P- 106-42-3 11 bXylenes 1330-20-7 1.4 gZinc Cyanide 557-21-1 3,900 aZinc Phosphide 1314-84-7 23 aZineb 12122-67-7 170 bZirconium 7440-67-7 6.3 a

Notes:

Last updated by Heather Kuoppamaki, DEQ-NWR, on June 17, 2019

f - Ecological Soil Screening Levels, EPA (2005, 2007), http://www.epa.gov/ecotox/ecossl/g - Ecotoxicological screening benchmarks developed by Oak Ridge National Laboratory: https://www.lanl.gov/environment/protection/eco-risk-assessment.php

d - Risk Based Concentrations, DEQ (May 2018), Leaching to groundwater. e - Table 1, Guidance for Ecological Risk Assessment, Level II Screening Level Values, DEQ (2001), https://www.oregon.gov/deq/FilterDocs/GuidanceEcologicalRisk.pdf

c - Risk Based Concentrations, DEQ (May 2018), Residential soil. https://www.oregon.gov/deq/FilterDocs/RBDMTable.pdf

a - Regional Screening Levels, EPA (May 2018), Residential soil. http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/index.htm

b - Regional Screening Levels, EPA (May 2018), groundwater protection (x60 to convert to Oregon dilution attenuation factor).

Portland

Blue Mountains

Basin and Range

Coast RangeCascade Mountains High Lava Plains

Owyhee Uplands

Deschutes Columbia

Klamath Mountains

South

Willa

mette

Sources: Esri, HERE, Garmin, USGS, Intermap, INCREMENT P, NRCan, Esri Japan, METI, EsriChina (Hong Kong), Esri Korea, Esri (Thailand), NGCC, © OpenStreetMap contributors, and the GISUser Community Figure 1. Physiographic Provinces of Oregon